High quality material: Made of durable aluminum alloy, ensuring long-term use. Perimeter trip alarm: Provide effective safety solutions or property. Easy to install: Equipped with iron trigger wire and pull ring, easy to install and set up. Compact size: The product measures approximately 7.6x2.5x2.5CM, making it easy to place with caution. Widely used: Suitable for environments, including homes, businesses, and outdoor areas. Colour:As Shown Material:aluminum alloy Package Contents: 1 * perimeter trip alarm 1 * trip wire Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.